Triphosphoric acid

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Triphosphoric acid
Structure of triphosphoric acid
CAS number 10380-08-2 YesY
Molecular formula H5P3O10
Molar mass 257.95 g/mol
Acidity (pKa) small, small, 2.30, 6.50, 9.24
Main hazards Corrosive (C)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Triphosphoric acid (also tripolyphosphoric acid), with formula H5P3O10, is a condensed form of phosphoric acid.

In the family of phosphoric acids, it is the next polyphosphoric acid after pyrophosphoric acid, H4P2O7, also called diphosphoric acid.

Compounds such as ATP (adenosine triphosphate) are esters of triphosphoric acid.

Another source [1] offers a different set of pKa values: 1.0 ; 2.2 ; 2.3 ; 3.7 ; 8.5